Shenzhen Hongkangyu Technology Co., Ltd. was established in 2011, close to China South Sea with beautiful scenery. Our company is specialized in the R&D, production, sale and service of home audio & video accessories, and mobile phone & PC peripheral products, such as mini speakers, telephone recording boxes, backup batteries, power banks, anti-radiation mobile handsets, etc. Our company has passed ISO9001 and ISO2000 international quality certifications and CCC authentication (Chinese ...